[nucleardog]

If you're okay with (1) not supporting the guy that designed it in the first place and (2) taking a risk on a Chinese knock-off (reviews generally seem good), you can often find the Hackrf One on the usual suspect sites straight from China relatively cheaply.

There's a listing right now for just the hackrf one board at $125USD (versus a legit one at $350USD).

Hate to say it but I ordered one from there (with a metal case, high stability clock, assortment of antennas and other useful stuff) for $160.

I've had my eye on one for years, but it's just never going to be something I'm willing to drop $350+ on as part of the hobby.

[sva_]

I don't think you can really call them a knockoff. As far as I know, the HackRF has been designed as an opensource hardware[0], so I'd guess the designer intended it to be built by different entities.

[0] https://github.com/mossmann/hackrf/tree/master/hardware

  "This is a free hardware design; you can redistribute it and/or modify it under the terms of the GNU General Public License[..]"